how often do you get earthquakes?

Quite a lot especialy since the fault line is on the motorway. The biggest earthquake in New Zealand was in the Wairarapa in the 1860's and it was 8.4. A more recent earthquake was in Christchurch last year,it was 7.1 .People say that the after shocks could be going for a year.No people died. the biggest earthquake I've been In was about 4.5.There have been lots of 1.1 earthquakes during day and night.